12 Jul
2005
12 Jul
'05
11:17 p.m.
On Tue, 12 Jul 2005, Stefan wrote:
Can anybody tell me what this little blue box is ?
http://www.xs4all.nl/~rimmer/mysterybox/
There is no way to tell what it is precisely from photos, make a
schematic and maybe we can. It's obviously hand made.
Well it's got a 74181 4-bit ALU, and a demux and flops, but a lot
of LEDs, so maybe it calculates CRCs, checksums, or tallies input
pulses, or counts complicated events. There's enough glue in there
to make a decent little processor-like state machine with ALU, so
it could be a very clever little box, but it probably solves some
specialized niche function, and without knowing where and how
you'll likely never know.